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Zhao T.,Beijing Institute of Technology | Wang J.,Beijing Institute of Technology | Xu X.,China Coal Information Institute | Wang G.,Beijing Institute of Technology
China Petroleum Processing and Petrochemical Technology | Year: 2015

The hierarchically structured ZSM-5 composites (HZC) with trimodal pores (macropores/mesopores/micro-pore) were synthesized by transforming the skeleton of the macroporous aluminosilica gel into ZSM-5 pure phase crystals through steam-assisted conversion method. The monolithic aluminosilica gel was used not only as the silicon and aluminum sources, but also as a structural support. The synthesis parameters, such as the composition of the precursor solution, the Si/ Al feed ratios of the support gel, the time for impregnation of the support with the synthesis mixture and the structure-directing agents (SDAs) with different crystallization temperatures, were investigated. The textural properties of the resulting samples were characterized by means of the Fourier transform infrared (FT-IR) spectroscopy, X-ray powder diffractometry (XRD), scanning electron microscopy (SEM) and N2 adsorption-desorption isotherms. The experimental results indicated that the HZC could be manufactured with quaternary ammonium hydroxide as SDA without seeding and additional sources of silicon or aluminum, the Si/Al feed ratio of the support and pretreatment time had a significant effect on the morphology of the products using tetrapropyl ammonium hydroxide (TPAOH) as SDA. Furthermore, the textural properties varied from the macroporous aluminosilica gel when different SDAs at different crystallization temperatures were also discussed. Source

Tan B.,China University of Mining and Technology | Song Y.,China Coal Information Institute | Shi W.,China University of Mining and Technology
Proceedings - 2014 IEEE Workshop on Advanced Research and Technology in Industry Applications, WARTIA 2014 | Year: 2014

The current coal mine security situation grim, malignant accidents occur frequently, the main reason is serious illegal or irregular act, the manage problem of false lax in some places is relatively outstanding. In order to solve illegal violation of coal mine and management from carrying out the problem. This article first from the background of the Gu county in ShanXi coal mine, introduces in detail the application of coal mine safety supervision, by introducing the construction safety supervision of the problem, proposed the necessity of the coal mine production safety supervision and the specific questions that might encounter, according to the principle of safety supervision work is put forward to establish the system of coal mine safety production supervision formulate thought. The results show that the introduction of independent third party according to the relevant guidelines, policies, rules and regulations and technical standards to the coal mine production process implementation services, and to the behavior of the coal mining enterprises to form effective restriction mechanism, can make up for the government macroscopic supervision and the limitations of their own management and shortage. The establishment of the system to provide a reliable guarantee for coal mine safety production. © 2014 IEEE. Source

Nie B.,China University of Mining and Technology | Huang X.,China University of Mining and Technology | Sun X.,China Coal Information Institute | Li A.,China University of Mining and Technology
Safety Science | Year: 2016

The research targets to obtain the extent of the physiological changes of the victims of accidents. During the research, the physiological indexes of the volunteers were first measured both before and after the experiment for which the coal mine accidents are simulated; next, the extent of the variations and the significant differences of the indexes are analyzed. The results indicate that the victims of the accident have experienced intense physiological and psychological changes. These significant physiological and psychological changes include: systolic blood pressure, mean pressure, pulse rate, pulse pressure, heart rate, R-R interval, R wave amplitude respiratory rate. The one that has gone through the most significant variation is the pulse pressure. However, only the systolic blood pressure and the heart rate have demonstrated significant change during the second trial. Practical Applications: The psychological changes of the victims are rather rapid and complex. The victims' abilities for carrying out proper judgments and actions that accord with the surrounding were weakened by their physiological state. It is of significance to quantitatively analyze physiological variation of the victims, to select the staffs through the personality assessment and to improve individual's psychological quality and the ability of emergency disposal by training in the simulated accident scenarios. © 2016 Elsevier Ltd. Source

Guo D.,China University of Mining and Technology | Li F.,China University of Mining and Technology | Liu W.,China Coal Information Institute
China Petroleum Processing and Petrochemical Technology | Year: 2013

Influence of ammonium salt treatment and alkali treatment of the coal based activated carbon (AC) and activated carbon fiber (ACF) adsorbents on methane adsorption capacity was studied via high-pressure adsorption experiment. Surface functional groups and pore structure of two types of adsorbents were characterized by the application of infrared absorption spectroscopy (IR) and low temperature liquid nitrogen adsorption method. The results show that both ammonium salt treatment and alkali treatment have obvious effect on changing BET, pore volume as well as pore size distribution of adsorbents; and methane adsorption capacity of the activated carbon fiber is the maximum after the ammonium salt treatment. Source

Mei G.,China Academy of Safety Science and Technology | Liu L.,China Coal Information Institute
Progress in Mine Safety Science and Engineering II - Proceedings of the 2nd International Symposium of Mine Safety Science and Engineering | Year: 2014

While probing into the investigation mechanism for the accidents occurring in American coalmines, the differences of the enforcement basis and mechanisms on the coalmine accidents between China and USA are compared and analyzed. Furthermore, the problems of China in the accident investigation mechanism are reviewed in a scientific, independent and systematic approach. Then, the author suggests the American advanced experiences and operations should be learnt, and subsequently comes up with the countermeasures for improving the investigation mechanism of China. © 2014 Taylor & Francis Group. Source

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